<!DOCTYPE html>
<link rel="help" href="https://crbug.com/345562934">
<link rel="help" href="https://drafts.csswg.org/css-text-decor-3/#text-decoration-line-property">
<style>
.c7 {
  text-decoration: underline;
  appearance: button;
}

.c7::first-line {
  text-decoration: overline;
}

.c15 {
  text-decoration: line-through;
}
</style>
<dfn class="c7"><strong class="c15">test</strong></dfn>
